-al a-a a-b a-c a-t aaa aab aac aae aag aal aan aat ab- aba abb abc abe abg abl abn abt ac- aca acb acc ace acg acl acn act aea aeb aec aee aeg ael aen aet ag- aga agb agc age agg agl agn agt al- ala alb alc ale alg all aln alt an- ana anb anc ane ang anl ann ant at- ata atb atc ate atg atl atn att baa bab bac bae bag bal ban bat bba bbb bbc bbe bbg bbl bbn bbt bca bcb bcc bce bcg bcl bcn bct be- bea beb bec bee beg bel ben bet bga bgb bgc bge bgg bgl bgn bgt bla blb blc ble blg bll bln blt bna bnb bnc bne bng bnl bnn bnt bta btb btc bte btg btl btn btt c-- caa cab cac cae cag cal can cat cba cbb cbc cbe cbg cbl cbn cbt cca ccb ccc cce ccg ccl ccn cct ce- cea ceb cec cee ceg cel cen cet cga cgb cgc cge cgg cgl cgn cgt cl- cla clb clc cle clg cll cln clt cn- cna cnb cnc cne cng cnl cnn cnt cta ctb ctc cte ctg ctl ctn ctt eaa eab eac eae eag eal ean eat eba ebb ebc ebe ebg ebl ebn ebt ec- eca ecb ecc ece ecg ecl ecn ect eea eeb eec eee eeg eel een eet ega egb egc ege egg egl egn egt ela elb elc ele elg ell eln elt en- ena enb enc ene eng enl enn ent eta etb etc ete etg etl etn ett gaa gab gac gae gag gal gan gat gba gbc gbe gbg gbl gbn gbt gca gcb gcc gce gcg gcl gcn gct ge- gea geb gec gee geg gel gen get gga ggb ggc ggg ggn ggt gla glb glc gle glg gll gln glt gna gnb gnc gne gnl gnn gnt gta gtb gtc gte gtg gtl gtn gtt la- laa lab lac lae lag lal lan lat lba lbb lbc lbe lbg lbl lbt lca lcb lcc lce lcg lcl lcn lct lea leb lec lee leg lel len let lga lgb lgc lge lgg lgl lgn lgt lla llb llc lle llg lll lln llt lna lnb lnc lne lng lnl lnn lnt lta ltb ltc lte ltg ltl ltt naa nab nac nae nag nal nan nat nba nbb nbc nbe nbg nbl nbn nbt nca ncb ncc nce ncg ncl ncn nct ne- nea neb nec nee neg nel nen net nga ngb ngc nge ngg ngl ngn ngt nla nlb nlc nle nlg nll nln nlt nna nnb nnc nne nng nnl nnn nnt nta ntb ntc nte ntg ntn ntt taa tab tac tae tag tal tan tat tba tbb tbc tbe tbg tbl tbn tbt tca tcb tcc tce tcg tcl tcn tct te- tea teb tec tee teg tel ten tet tga tgb tgc tge tgg tgl tgn tgt tla tlc tle tlg tll tln tlt tna tnb tnc tne tng tnl tnn tnt tta ttb ttc tte ttg ttl ttn ttt